Measure the current capacity of the hv battery

[grefna]

Hi,
is there a any accurate way to measure the current capacity of a Tesla model 3. I read about charging to 100%, discharging it and do the math, but is there not a more accurate way to do this?
If its not possibly on my own, is it possible to do a measurement in a workshop?

 

[Regaj]

Well, Tesla's own sensors capture several measurements along that line... Nominal Full Pack, Nominal Remaining, Full Pack When New (82.1 kWh in current Model 3's), and Calculated Amp-Hour Capacity.

You'll need the Scan My Tesla app and and OBDlink device to be able to access your car's can bus... but there's a remarkable amount of data coming from the car. Highly recommended.

 

[ATPMSD]

This seems to work

1. Go to the energy screen. Ensure it is set to average and not instantaneous, the other setting does not matter
2. Multiple the average consumption by range and divide by 1,000. This is the current kWh in the car
3. Divide this by the SOC percentage as show in the car

This is approximately the full charge capacity of the battery

 

[KenC]

Yep, you can do the approximation as ATPMSD specifies, and if your result looks odd, you can try what Regaj recs, which is an OBD reader and SMT app, and an adapter.